Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:41:51 2013

Optimize a model with 1320 rows, 6060 columns and 15100 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.09s
Presolved: 1300 rows, 6040 columns, 14080 nonzeros
Variable types: 5040 continuous, 1000 integer (1000 binary)

Root relaxation: objective 3.860476e+04, 558 iterations, 0.01 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0 38604.7615    0    6          - 38604.7615     -      -    0s
     0     0 38752.3890    0    6          - 38752.3890     -      -    0s
     0     0 38753.1161    0    7          - 38753.1161     -      -    0s
     0     0 38756.7437    0    7          - 38756.7437     -      -    0s
     0     0 38757.0720    0    7          - 38757.0720     -      -    0s
     0     0 38757.6339    0    7          - 38757.6339     -      -    0s
     0     0 38757.6339    0    7          - 38757.6339     -      -    0s
H    0     0                    38862.894219 38757.6339  0.27%     -    0s
     0     2 38757.6339    0    7 38862.8942 38757.6339  0.27%     -    0s
*   34     4              30    38861.052123 38845.2719  0.04%   8.9    0s

Cutting planes:
  Gomory: 2
  Implied bound: 40
  Flow cover: 4

Explored 40 nodes (1245 simplex iterations) in 0.46 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.886105212265e+04, best bound 3.885730521453e+04, gap 0.0096%